Rox, to elaborate on what magnus said, the cpm you set determines priority. For instance if you set network A at $1.00 and Network B at 0.99, Network B will only be asked for an ad if Network A fails to fill.
Rox, to elaborate on what magnus said, the cpm you set determines priority. For instance if you set network A at $1.00 and Network B at 0.99, Network B will only be asked for an ad if Network A fails to fill.